What is CVE-2026-64122?

CVE-2026-64122 is a unscored severity Linux kernel vulnerability, affecting Linux kernel versions from 6.18.14 onward and patched in 6.18.34, 7.0.11 and 7.1. CVE-2026-64122 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-64122?

CVE-2026-64122 has a CVSS score of pending NVD analysis out of 10, rated awaiting scoring severity.

Is there a patch available for CVE-2026-64122?

Yes, CVE-2026-64122 has been patched. Fixed versions include 6.18.34, 7.0.11 and 7.1. If you are running Linux kernel 6.18.14 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-64122 actively exploited?

CVE-2026-64122 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-64122

In the Linux kernel, the following vulnerability has been resolved: net/mlx5e: Fix use-after-free in mlx5e_tx_reporter_timeout_recover mlx5e_tx_reporter_timeout_recover() accesses sq->netdev after mlx5e_safe_reopen_channels() has torn down and freed the channel (and its embedded SQs). Replace the three sq->netdev references with priv->netdev which is safe because priv outlives channel teardown. The netdev_err() call already used priv->netdev for this reason; make the trylock/unlock and health_channel_eq_recover calls consistent. This fixes the following KASAN splat: BUG: KASAN: use-after-free in mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core] Read of size 8 at addr ffff889860ed0b28 by task kworker/u113:2/5277 Call Trace: mlx5e_tx_reporter_timeout_recover+0x1dd/0x360 [mlx5_core] devlink_health_reporter_recover+0xa2/0x150 devlink_health_report+0x254/0x7c0 mlx5e_reporter_tx_timeout+0x297/0x380 [mlx5_core] mlx5e_tx_timeout_work+0x109/0x170 [mlx5_core] process_one_work+0x677/0xf20 worker_thread+0x51f/0xd90 kthread+0x3a5/0x810 ret_from_fork+0x208/0x400 ret_from_fork_asm+0x1a/0x30

Package Linux Kernel

Published 2026-07-19

Last modified 2026-07-19

Patch available

Yes

Affected versions

Linux kernel versions 6.18.14, 6.19.4, 7.0 and later are affected. Fixed in 6.18.34, 7.0.11, 7.1 and their respective stable series.

Affected from

≥ 6.18.14 ≥ 6.19.4 ≥ 7.0

Fixed in

✓ 6.18.34 6.18.x ✓ 7.0.11 7.0.x ✓ 7.1

References

3 total

Frequently asked questions

What is CVE-2026-64122?

CVE-2026-64122 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.18.14 onward and has been patched in 6.18.34, 7.0.11 and 7.1. CVE-2026-64122 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
Is there a patch available for CVE-2026-64122?

Yes — CVE-2026-64122 has been patched. Fixed versions include 6.18.34, 7.0.11 and 7.1. If you are running Linux kernel 6.18.14 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-64122 actively exploited?

No — CVE-2026-64122 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.